Turntable center



July 26, 1927. 1,636,993

C. M. GOODRICH TURNTABLE CENTER Filed Dec. 23:. 1926 2 Sheets-Sheet 1 do`is /59I July 26,1927. 1,636,993

. C. M. GOODRlCH TURNTABLE CENTER Filed Dec. 23, 1926 2 Sheets-Sheet 2do l 5.9

/ AA AAA Ann AAIA Patented July 26, 192i?.

ormoni TURNTABLE CENTER.

Application filed December 23, 1926F Serial No. 156,686, and inCanuda'Deeember 14, 11926.

This invention has relation to certain new and useful improvements inturntable centers and more particularly the center bearing structurethereof. l

The invention has tor an object the pro-v vision or' a turntable centerstructure including center bearing members ot improved construction andon which the main transverse girders or the turntable are mounted andconnected with the upper bearing casting or member through the medium ora pair of vertically removable pins having tapered lowerextremitiesreceived in pockets pro'- vided theretor in the upper bearing casting,after the pins are extended through the horizontally removablel bearingplate.

Another object or the invention resides in the provision or a' turntablecenter in which the parts may be readily assembled and con# nected b vthe vertically removable pins dropped down through the trame casting be;tween the main horizontal center beams of the turntable, or the portionsot' the center bearing removed and inspected or replaced b v simplywithdrawing or raising up vertically the vertical locking and centeringpins.

i 'further object of the invention resides in the provision of aturntable center or the character' stated in which bearing disks and abearing sleeve are employed betweenthelower' and upper center bearingcastings or members and means provided for thoroughly lubricating thebearing members and the portions of the castings working thereon toassure eihcient operation and reduce friction to the minimum, di'iring'operation of the turntable.

The invention has 'for' stillturther obliect, the provision of a centerlbearingof the character stated composed oli the minimum number or partsor simple construction and which may be' readily assembled or takenapart after insert-ing or removing, vertically the vertical bearing pinswhich are moved vertically between the main horizontal center beams otthe turntable and Without the necessity or first raising or jacking upthe turntable proper.

lilith the foregoing and other objects in View, as will appear as' the,description proceeds, the invention consists or the novel construction,combination and arrangementof cooperating elements, as hereinafter morespecifically' set forth, claimed and shown in the accompanying drawingsforminga partl or the present application and in Which- Figure 1 is anelevation Vot' the improved center' bearing structure, partially insection.Y Figure 2 is a vertical section, substantially on the lplane'-ofline II-II ot Figure 1, looking in' thedirectien indicated by thearrows, partially in elevation.

Figure 3 is a vertical section, substantially on the plane o" lineVIll-III of Figure'V 2,- looking in the direction indicated `by thearrows. I

Figure 4l is' a top plan of the upper" bear-l ing or member. V Figure 5is' a. detail perspectiveof the horizontally removablebearing plate. 70

Referring more in detail to the drawings in which similar characters,designate corre'- sponding parts throughout the several views, it istov be noted that the center bearing structure includes a lower castingor hase member 11, which is firmly anchored on a concrete base or'thelike 12 by anchoring bolt-s 13, as shown clearly in Figures 1 to' 3inclusive. The vbot'tomcastingv or base mniber 11 has a centralconcentric upstanding portion 111- With a horizontal upp'erpla-te 15 onits upper edge, thus forming' a hollovv' central chamber 16. A centralupstanding sleeve 17, is' carried on the plate 15 and also" an outerconcentric opstanding flange 18 on the outer portion of the plate- 15,outwardly ot-the portion 14 or the casting.' andl near the edge of theplate 15, as shown clearly Figures' 2 and 3. plurality' of spacedtriangular' ribs 19 are" also' provided as a part or the bottomcast-iiig', the lower edges' of the ribs 19 connecting'. with the bottomplate 11 or the casting while their inner and upper edges conne-ct withthe-upstancling'poition 14, the upper plate 15 and the upstanding outerflange 18. The outer free edges of the ribs 19 are inclined ,and it willbe evidentA that the ribs 19 serve to ree'nforce and strengthen theentire base member or casting. It Will also be seen clearly from Fig'-10 ures 1 and 2 that the anchoringbolts 13 are located between theradially extended ribs 19'. The upper bearing member or' casting 20 isinverted and is provided with a depending and concentric central sleeveor fiange 21 adapted to surround the upstanding sleeve or flange 17 oi't-he bottom casting or base member 11 when the upper bearing member orcasting 20 is in position, as shown in the drawings. The sleeve orflange 21, however, is spaced from and surrounds the upper portion onlyofy the sleeve or flange 17 so as to receive and accommodate thevertical bearing sleeve 22 between the sleeves 17 and 21. Anintermediate depending annular sleeve or flange 23 is also provided onthe upper bearing member or casting 20, outwardly of the sleeve orflange 21. A pair oit bearing disks 24 are interposed on the upper faceof the raised main part 15 ot' the upper plate 15 of the bottom castingor base member 11. The bearing rings 24 surround the lower part oiE thebearingl sleeve 22 and the lower and upper bearing rings 24 have,respectively, threaded therein pairs ot depending pins 25 engaged inpockets 26 ot the plate 15 and upstanding pins 27 engaged in pockets 28provided therefor in the bottom of" the sleeve or flange 23, thuslocking the lower and upper bearing rings 24 with the base member orbottoni casting- 11 and the upper castingor bearing member 20,respectively` to assurerotation of the upper bear ing ring 24 on thelower bearing ring 24 as the upper casting or bearing member 20 isrot-ated on the base member or bottom casting 11, duringl operation ofthe turntable aswill be later clearly apparent. It will be clearly seenfrom Figures 2 and 3 that the weight of the upper bea-ring member orcasting 20 and the entire turntable structure resting thereon istransmitted to the bearing rings 24 through the .spaced concentricsleeves or flanges 21 and 23 o'l the upper casting or bearing member 2()resting on the upper 'face of the upper bearing ring 24 and an inner oilor lubricant receiving'reservoir 29 is 'formed above the bearing rings24 and in the upper casting or bearing member 20, by the dependingsleeves or flanges 21 and 23. Oil or lubricant passage grooves 36 areformed in the lower edge ot the sleeve or flange 23 lto permit passageot the oil or other lubricant from the oil or lubricant reservoir 29 tothe outer oil or lubricant reservoir 31, surrounding the sleeve orflange 23 and the bearing ring 24 and having its outer wall `formed bythe upstanding outer flange 18 of the bottom casting 11, and theoutwardly flared depending outer flange 32 of the upperbearing casting20. It will be readily seen by referring to Figures 2 and 3, that theflange 32 has its lower edge 3?) directed downwardly and engaged aroundthe reduced upper edge portion 34 of the flange 18 to assure properfitting of the casting of upper bearing member and rotation. thereof vonthe bottom casting or base member 11. A plurality of pairs of radiallydirected ribs 35 aire provided on the outer face of the casting or upperbearing member 20. Gpcnings 36 are provided in the ribs 35 to receivesuitable tools 'for holding the casting or upper bearing members whenplacing the same in position or raising the casting or upper bearingmember from upon the lower casting or base member 11. It will also beunderstood that similar openings 37 are provided in the ribs 19 so thatthe lower casting or base member 11 may be properly handled when beingplaced in position on the concrete base l2 or removed therefrom. Alubricant supply pipe 38 has a turned lower end 89 with a threadedextension 40 secured in the upper portion of the bearing member orcasting 20 and opening` into the upper port-ion ot the inner lubri'antreservoir 29, as shown clearly in Figure 2. The upstanding portion olthe lubricant supply pipe 88 may have an appropriate lubricantaccomnlodating cup 41 provided thereon, as also shown in Figure Theupper bearing member or casting 2() has an elongated fiat upper centralportion 42 which is provided with a pair of tapered spaced poche 42%equal distances from the center ot the casting` 2O to receive thetapered lower ends 44 of vertical centering` and locking pins 45employed tor centering and locking the turntable proper on the cen-4 terbearing structure. The pins 45 are eX- icnded through and supported inthe trame casting 46 which is adapted to rest on the horizontallyremovable center bearing plate 47 which in turn is adapted to rest onthe portion 42 of the casting or upper bearing member 20. The plate 47is provided with spaced pin accommodating openings 48 adapted toregister with the pockets 49; and the pin openings 49 provided in the'trame casting 46, when such parts are in alinement with one another onthe center bearingstructure as shown inthe drawings. The trame casting46 is suspended between the spaced cross beams 50 which are securelyfastened to the reduced upper portions 51 of the it'rame casting 46 andon opposite sides thereof, as sho-wn clearly in Figure 2` by rivet-s orotherA suitable means. rlhe cross beams 50 extend above the framecasting 46 and spacing plates 52 are secured on their outer faces, alongtheir upper edges. The fastening members employed for this purpose. alsoextend through the main portions of the angle plates 54 and 55 and thevertical spacing plates positioned therebetween and also through theouter plates 57 on either side of the frame casting 46. The angle plates54 and have their upper portions 58 and 59, respectively, turned inopposite directions and secured attheir ends to the under face of theupper'flanges 60 of the spaced pair of main transverse beams 61 of theturntable structure proper. Rivets 62 or other appropriate means may beemployed for securing together the lower edge portionso'f the angleirons 54, the pla-tes 56 and' 5T and the upturne'd angle portions of theangle bars 63 inserted between the lower parte of the plates 56 and 5T.The outturned Aangular portions 64 of the' angle' bars are secured atopposite ends' to the lo'v'er flange 65 of the main transverse centerbeams 6l of the turntable vproper structure. lt 'with therefore, be seenthat the frame casi' r lo extends transversely of the main tranaersecenter beams 6l of the turl'itablei proper structure and thus supportsthe pair of vertically insertable and removable locking pins 45 employedfor locking the turntable proper structure on its center bearing?. The'pins l5 may be readily inserted or removed by suit-able tools orinstruments en; .eed

i through openings G6 provided for this purpose in the upper extendedVportions of the pins 45, as shown Figures l and It is believed theconiplote construction and operation may bene-iv apmrent from theforegoing'` paragraphs taken in connection with the accompanying'drawings AWithout further detail description. 'lhemountingr of thevarious parts and their cooperation and also the manner ofdisconnecting` the turntable proper structure from the cen ter bearingstructure for inspection or ref pair ofthe lat-ter may loe brieflystated, how'- ever, as follows:

The upper casting or bearing` member 2O may readily be raised and passedover the flange 31 of the lower casting or base member 1l when beingplaced in position on or removed from the latter. It is also clear thatthe pins 45 must be raised and the horizontally removable bearingl platel? removed horizontally previous to raising of the upper casting orbearing member 2O above the bottom. casting or base memberll7V if themain center beams of the turntable proper structure are in position asshown in the dravvings with the frame casting'` t6 above the centerbearing structure to accommodate the vertically removable locking pins425. The bearing disks 24 and the bearing' sleeve 22 may be readilyplaced in position or removed When the upper casting or member isremoved vertically from its position on the lower bearing. or baseymember ll yby sufitable meansengaged' with the perforated ribs 35'. Itis also evident that the bottom rasting or base member 1l may be' r Vland lbiver'ed vertically` by appropriate means engaged with theperforated ribs I9 thereof..

Before removing the bearing pla-teef?, the turntable will preferably bebloel'redfy up to prevent sagging when the' plate 47 is removed, and insome instances, it may be necessary to' raise theytable by the use ofWedges or' jaclis sufficiently to* remove'k tl e `veight of the table`from the bearingfplate 47 in order' to facilitate the removal andreplacement of such plate.A i f l As all of the parts of the centerbearing structure as Well as the locking' pinsflk for locking theturntable prop-er structure on the center bearing structure, kmay bereadily yaised or lowered vertically (the bearing plate l? beingremovable and insertable horizontally when the locking` pins 45 arelifted sufliciently to clear the same and this bearing plate l? beingthe only part which is not separated from the 'other parts or placed inposition in respect fthereto by' movement through a vertical plane)alllof the parts may be readily assembled or dis connected vWithout thenecessity of irst j achingup the turntable proper structure anyappreciable amount. Furthermore, the only connection betweenv theturntable prop-er structure and the center bearing structurer in thisinvention, is made by the vertical lockingpinsl which.. are insertableand removable vertically between the' main center beams 6l of theturntable proper structure'. lllhile the preferred embodiment of theinvention has been disclosed, it is to be' understood that minor changesin the detailed construction, combination and arrangement ofcooperating' elements, may be' r'esortedfto within the scope of thelappended claims Without departingr from the spirit of the in,- ven'tion.y

l claim4V .p l.- In a turntable center structure, includingtl-iecombination with a turntable proper and a rotatable center bearing'member adapted. to be vertically removed from its operable positionwithout first lift-ingI or jacking'I up the turntable pro-per. ofvertically removable or insertable cen-tering 'and locking,pins`extending' through the tu frtable proper and into said center bearingmember.` Y Y 2. In a turntable center structure, the combination With aturntable proper incluidma-iln center beams With a fr.AA e be ringtherebetween and a rotatable center bearing member adapted to be removedand placed in position vertically Without first raising' or jacking upthe turntable proper, of pair of vertically reinovable centering andlocking members iv'oi ring tl'iroi'igh' said frame bearing' on oppositesides of the center of said bearing member, said center-infr. andlcwlnugv members having tapered low-er ends vreceivable in' pocketsprovided therefor in said cent-er bearing member.

3. In a turntable center structure, the combination ivit-h a. conterbearing' member and a supporting` frame bearing carried by the turntableproper, of vertically removable and insertable centering' and lockingmeans supported in said supporting frame bearing and engageable withsaid center bea-ring member', and an intermediate bearing plateinsertable and removable horizontally between said turntable proper andsaid center bearing member, said bearing plate being provided withopenings to accommodate said centering and locking means when the`latter are in operative position.

4. In a turntable structure, the combination vwith a center bearing anda turntable proper. ol vertically removable and insertable centering andlocking meansI carried by the turntable proper and engageable. with saidcenter bearing, and an intermediate bearing plate insertable andremovable horizontally between said turntable proper and said centerbearing member, said bearing plate being provided with openings toaccommodate said centering and locking means when the latter are inoperative position.

5. ln a turntable center structure. the combination with a rotatablecenter bearingand the turntable proper. ot a pair ot verticallyremovable and insertable centering and locking members operable throughthe turntable proper and engageable in said rotatable bearing member.and an intermediate bearing plate insertable and removable horizontallybetween saidturnlabl-e proper and said center bearing member` saidbearing plate being provided with openings to accommodate said centeringand locking meinbers when the latter are in operative position.

6. In a turntable center struct-ure. including the combination with aturntable proper and a rotatable center bearing member adapted to bevertically removedltrlom its operable position without first lit'ting or jacking up the turntable proper. ot vertically removable or insertablecentering` and locking pins extending through the'turntaliile proper andinto said center bearing meinber. and an intermediate bearing plateinsertable and removable horizontally between said turntable proper andsaid center bearingmember, said bearing plate being provided withopenings to accommodate said centering` and locking pins when the latterare in operative position.

7. In a turntable center structure, the combination with a turntableproper including main center beams with a trame bearing therebetween anda rotatable center bearing member adapt-ed to be removed and plaeed'inposition vertically without first raising or jacking upV theturntableproper, ot a pair ot vertically removable centering and lockingmembers working through said trame bearing on opposite sides ot thecenter ot said bearing member. said centering and locking membershavinf" tapered lower ends receivable in pockets provided.theretor insaid center bearing member, and an intermediate bearing plate insertableand removable horizontally between :aid turntable proper and said centerbearingmember, said bearing plate being provided wit-h openings toaccommodate said centering` and locking members when the latter are inoperative position.

8. In a turntable center structure, the combination with a centerbearing'member and a supporting trame bearing carried by the turntableproper, ot vertically removable and insertable centering` and lockingmeans supported in said supporting trame bearing an d engageable withsaid center bearing member, a stationary base center bearing memberhaving an upstanding tlange and la center sleeve, a bearing sleevesurrounding said center sleeve, superimposed bearing rings mounted onsaid base bearing member around said bearing sleeve, the tirst mentionedcenter bearing member having spaced annular depending llanges resting onsaid bearing rings and surrounding the upper portion ot said bearingsleeve, said tirst mentioned center bearing member having an outerannular tlange overlapping and riding on the annular' liange ot rsaidbase center bearing member, thus providing inneil and outer lubricantreservoirs above and surrounding, respectively, said bearing rings, saidlirst mentioned or upper center bearing member having grooves to formcommunication between said inner and outer lubricant reservoirs, saidbase center bearing member and said upper center bearing member havingperforated radial ribs to receivelitting tools, and means tor lockingthe lower and upper bearing rings with said base center bearing memberand said upper center' bearing member respectively.

9. In a turntable structure, the combination with a center bearing and aturntable proper, ot vertically removable and insertable centering andlocking meanscarried by the turntable proper and engageable with saidcenter bearing, a stationary base center bearing member having anupstanding flange and a center sleeve, a bearing sleeve surrounding saidcenter sleeve, superimposed bearing rings mounted on said base Ybearingmember around said bearing sleeve, the iirst mentioned center bearingmember having spaced annular depending flanges resting on said bearingrings and surrounding the upper portion ot said bearing sleeve, saidfirst mentioned center bearing member having an outer annular flangeoverlappingand riding on the annular liange ot saidbase center bearingmember, thus 'providing inner and outer lubricant reservoirs above andsurrounding, respectively, said bearing rings, said irst mentioned orupper centering bea-ring member having grooves to form communicationVbetween said inner and outer lubricant reservoirs, said base centerbearing member and said upper center bearing member having perforatedradial ribs to receive lifting tools,'and means for locking the lowerand upper bearing rings with said base center bearing member and saiduppei` center bearing member, respectively.

l0. In a turntable center structure, the

combination with rotatable center bearing and the turntable proper, of apair of vertically removable and insertable centering and bearingmembers operable through the turntable proper and engageable in saidrotatable bearing member, a stationary base center bearing member havingan upstanding tlange and a center sleeve, a bearing sleeve surroundingsaid center sleeve, supeiimposed bearing rings mounted on said basebearing member around said bearing ringsand .surrounding' the upperportion of said bearing sleeve, said lirst mentioned center bearingmember having an outer annular flange overlapping and Vriding on theannular flange of said base center bearingmember, thus providing iimerand outer lubricant reservoirs above and surrounding, respectively, saidbearing rings, said lirst mentioned or upper center bearing member liavhing grooves to form communication between said inner and outer lubricantreservoirs, said base center bearing member and said upper centerbearing member having perforated radial ribs to receive lifting tools,and means for locking the lower and upper bearing rings with said basecenter bearing inember and said upper center bearing member,respectively.

11.111 a turntable center structure, in cluding the combination withaturntable proper and a rotatable center bearing meinber adapted to bevertically removed from its operable position without lii'st lifting orpicking up the turntable proper of vertically removable or insertablecentering and locking pins extending through the turntable proper andinto said center bearing member, a stationary base center bearing memberhaving an upstanding flange and a center sleeve, a bearing sleevesurrounding said center sleeve, superimposed bearing rings mounted onsaid base bearing member around said bearing sleeve, the first mentionedcenter bearing member having spaced annular depending flanges resting onsaid bearing rings and surrounding the upper portion of said bearingsleeve, said first mentioned center bearing member having an outerannular flange overlapping and riding on the annular flange of said basecenter bearing member, thus providing inner and outer lubricantreservoirs above and surrounding, respectively, said bearing rings, saidfirst mentioned or upper center bearing member having grooves to formcommunication between said inner and outer lubricant reservoirs, saidbase center bearing member and said upper center bearing meniberhavingperforated radial ribs to receivelifting tools, and means forlockingfthe lower and upper bearing rings with said base center bearingmember and said upper center bearing member, respectively'. s Y

l2. In a turntable centerstructure, the combination with a Yturntableproper including inaiiicenter beams with' a frame bearing therebetweenand a rotatable center bearingv Qcoinbination with a center bearingmember and alsupporting frame bearing carried by the turntable proper,of vertically removable and insertable centering and locking meanssupportedyin said supporting fra-me bearing and engageable ywith saidcenter bearing member, and an intermediate bearing plate insertable andremovable horizontally `betiveen said turntable proper andsaid centerbearing member, said bearing plate being provided with openings toaccommodate said centering lockingmeans when the latter are in operativeposition, a stationary base center bearing member having an upstandingflange and a center sleeve, a'bearing sleeve surrounding said centersleeve, superimposed bearing rings mounted on said base bearing memberaroundv said bearing sleeve, the first mentioned center bearing memberhaving spaced annular ldepending iianges resting on said bearing ringsand surrounding the upper portion of said bearing sleeve, said firstmentioned center bearing member liavingpan outer annular flangeoverlapping and riding on the annular flangeof said base center beaiingmember, thus providing inner and outer lubricant reservoirs above andsurrounding, respectively,`said bearing rings, said first mentioned orupper centering bearing member having grooves to form communicationbetween said inner and outer lubricant reservoirs, said base centerbearing member and said upper center bearing member having perforatedradial iibs to receive lifting tools, and means for locking the lowerand upper bearing rings with said base center bearing member and saidupper center bearing member respectively, Y

141-. In a turntable structure, the combina tion with a center bearingYand a turntable proper, of vertically removable and insertable centeringand locking means carried by the turntable proper and engageable withvsaid center bearing, and an intermediate bearing plate insertable andremovable horizontally between said turntable proper 'and said centerbearing member, said bearing plate being provided with openings toaccommodate said centering and locking means when the latter are inoperative position, a

stationary base center bearing member having an upstanding flange and acenter' sleeve, a bearing sleeve surrounding said center sleeve,superimposed bearing rings mounted on said base bearing member aroundsaid bearing sleeve, the first mentioned center bearing member havingspaced annular depending flanges resting on said bearing rings andsurrounding the upper portion of said bearing sleeve, said firstmentioned center bearing member having an outer annular flangeoverlapping and riding on the annular flange of said 'base centerbearing member, thus providing inner and outer lubricant reservoirsabove and surrounding, respectively, said bearing rings, said firstmentioned or upper center bearing member having grooves to formcommunication between said inner and outer lubricant reservoirs, sai-dbase center bearing member and said upper center bearing member havingperforated radial ribs to receive lifting tools, and means for lockingthe lower and upper bearing rings with said base center' bearing memberand said upper center bearing member respectively. y

l5. ln a turntable center structure, the combination with afrotatablecenter bearing and the turntable proper, of a pair of verticallyremovable and insertable centering and bearing members operable throughthe turntable proper and engageable in said rotat' able bearing member,and an yintermediate bearing plate insertable and removable horizontallybetween said turntable proper and said center bearing member, saidbearing plate being provided with openings to accommodate said centeringand locking means when the latter are in operative position, astationary base center bearing member having an upstanding flange and acenter sleeve, a bearing sleeve surrounding said center sleeve,superimposed bearing rings mounted on said base bearing member aroundsaid bearing sleeve, the first mentioned center bearing member havingspaced annular depending flanges resting on said bearing rings andsurrounding the upper portion of said bearing sleeve, said firstmentioned center bearing member having an outer annular flangeoverlapping and riding on the annular flange of said base center bearingmember, thus providing inner and outer lubricant reservoirs above andsurrounding, respectively, said bearing rings, said rst mentioned orupper center bearing member having grooves to form communication betweensaid inner and outer lubricant reservoirs, said base center bearingmember and said upper center bearing member having perforated radialribs to `reecive lifting tools,

Leccese and means for locking the lower or upper bearing rings with saidbase center bearing member and said upper center bearing member,respectively.

16. ln a turntable center structure, including the combination with aturntable proper and a rotatable center bearing member adapted to bevertically remo ved from its operable position without first lifting orjacking up the turntable proper, of vertically removable or insertablecentering and locking pins eX-' tending through the turntable proper andinto said center bearing member, and an intermediate bearing plateinsertable and removable horizontally between said turntable proper andsaid center bearing member, said bearing plate being provided withopenings to accommodate said centering and locking pins when the latterare in operative position, a stationary base center bearing memberhaving an upstanding flange and a cen- Vter sleeve, a bearing sleevesurrounding said center sleeve, superimposed bearing rings mounted onsaid base bearing member around said bearing sleeve, the first mentionedcenter bearing member having spaced annular depemling flanges resting onsaid bearing rings and Vsurrounding the upper portion of said bearingsleeve, said first mentioned center bearing member having an outerannular flange overlapping and riding on the annular flange of said basecenter bearing member, thus providing inner and outer lubricantreservoirs above and surrounding, respectively, said bearing rings, saidfirst mentioned or upper center bearing member having grooves to formcommunication between said inner and outer lubricant reservoirs, saidbase center bearing member and said upper center bearing member havingperforated radial ribs to receive lifting tools, and means for lockingthe lower and upper bearing rings with said base center bearing memberand said upper center bearing member, respectively.

17. In a turntable center structure, the combination with a turntableproper including main center beams with a frame bearing therebetween anda rotatable center bearing member adapted to be removed and placed inposition vertically without first raising or jacking up the turntableproper, of a pair of vertically removable centering and lock` ingmembers working through said frame bearing on opposite sides of thecenter of said bearing member, said centering and locking members havingtapered lower ends receivable in pockets provided therefor' in saidcenter bearing member, and an intermediate bearing plate insertable andremovable horizontally between said turntable proper and said centerbearing member, said bearing plate being provided with openings toaccommodate said centering and locking members when the latter are inoperative lUO position, a stationary base center bearing member havingan upstanding flangeand a center sleeve, a bearing sleeve surroundingsaid center sleeve, superimposed bearing rings mounted on said basebearing member around said bearing sleeve, the first mentioned centerbearing member having spaced annular depending flanges resting on saidbearing rings and surrounding the upper' portion of said bearing sleeve,said first mentioned center bearing member' having an outer annularifi-ange overlapping and riding on the annular flange of said basecenter bearing member, thus providing inner and outer lubricantreservoirs above and surrounding, respectively, said bearing rings, saidlirst mentioned or upper center bearing member having grooves to formcommunication between said inner and outer lubricant reservoirs, saidbase center bearing member and said upper center bearing member havingperforated radial ribs to receive lifting tools, and means for lockingthe lower and upper bearing rings with said base center bearing memberand said upper center bearing member, respectively.

18. In a turntable center structure, the combination of an upper centerbearing' member, a stationary base center bearing member having anupstanding flange and a center sleeve, a .bearing sleeve surroundingsaid center sleeve, superimposed bearing rings mounted on said basebearing member around said bearing sleeve, the lirst inentioned centerbearing member having spaced annular depending flanges resting on saidbearing rings and surrounding the upper portion of said bearing sleeve,said first mentioned center bearing member having an outer annularflange overlapping and riding onthe annular flange of said base centerbearing member, thus providing inner and outer lubricant reservoirsabove and surrounding, respectively, said bearing rings, said firstmentioned or upper center bearing member having grooves to formcommunication between said inner and outer lubricant reservoirs, said`base center bearing member and said upper center bearing member havingperforated radial ribs to receive lifting tools, means for locking thelower and upper bearing rings with said base center bearing member andsaid upper center bearing member, respectively, said upper centerbearing member having tapered pockets on opposite sides of thecenterthereof in its upper portion to receive vertically insertable andremovable locling pins extended through a turntable proper for centeringand locking the turntable proper on the center bearing structure, and ahorizontally removable and replaceable bearing plate adapted to rest onsaid upper center bearing member and provided with openings adapted toregister with the pockets in said upper center bearing member andaccommodate said centering and locking pins when the latter are inoperative position.

In testimony whereof, I have hereuntov signed my name.

CHAUNCEY MARSH GOODRIOH.

